14-21
Computer Link
14
4 When a Z-311J/312J is used
1. Communication through the RS-232C port
1
3
2
7
6
8
15m or less
RS-232C
FG
RDc
TDc
GND
Short-circuit
terminal
Z-311J/312J
(Communication port CN3)
FG
SD
RD
SG
3
2
5
Communication connector on
the IV-S20 (RS232C/RS422)
Pin No. Signal name
Connector
shield
Pin No. Signal name
2. Communication through the RS-422 port (4-wire system)
RD
/RD
TD
/TD
FG
Z-311J/312J
(Terminal block TC1)
3
4
1
2
5
TA
TB
RA
RB
FG
4
7
8
9
Communication connector on
the IV-S20 (RS232C/RS422)
1 km or less
RS-422
Shielded, twisted-pair cable
Pin No. Signal name
Connector
shield
Pin No. Signal name
3 When a JW-1324K/1342K/1424K/1442K/1624K/1642K is used
The IV-S20 can only be connected to the RS-422 port. When the communication port is used,
provide a 2-wire RS-422 system. When the MMI port is used, provide a 4-wire RS-422 system.
1. When the communication port is used
JW-1324K/1342K/1424K
/1442K/1624K/1642K
(Communication port)
L1
L2
SHLD
Terminal name
TA
RA
TB
RB
FG
4
8
7
9
Communication connector on
the IV-S20 (RS232C/RS422)
1 km or less
RS-422
Shielded, twisted-pair cable
Pin No. Signal name
Connector
shield
2. When the MMI port is used
JW-1324K/1342K/1424K
/1442K/1624K/1642K
(MMI port)
2
7
3
8
4
5
PG／COM
GND
RX
／RX
TX
／TX
TA
TB
RA
RB
FG
4
7
8
9
Communication connector on
the IV-S20 (RS232C/RS422)
1 km or less
RS-422
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